import java.io.Serializable;


public class Bill implements Serializable{

	private static final long serialVersionUID = 1L;
	
	private String values="";
	
	public Bill(){
	}
	
	public void add(String s){
		values+=s+"\n";
	}
		
	public String print(){
		return "auctionID strike_price fee_fixed fee_variable fee_total\n"+values;
	}
	
	
}
